Can exercise treadmill cause a fast heart rate or would you just collapse?

In brief:
Maybe both

The purpose of an exercise treadmill is to elevate your heart rate up to your target heart rate to test the pump and electrical system. The object is not to make you collapse although that does rarely occur. We generally stop the test if there is a sense of impending collapse.

In brief:
Maybe both

The purpose of an exercise treadmill is to elevate your heart rate up to your target heart rate to test the pump and electrical system. The object is not to make you collapse although that does rarely occur. We generally stop the test if there is a sense of impending collapse.
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